APDTY 022114 Secondary Air Injection Emission Shutoff Check Valve w/Gasket Fits 4.2L 2004-2005 Buick Rainier Chevrolet Trailblazer GMC Envoy Olds Bravada Saab 9-7X (Replaces 12619128, 12575655) Meets Or Exceeds OEM Specs Factory OEM Fit Form And Function